Go to teh topic you want and edit the first post of the topic(or make a new topic). Bellow the box where you add the actual text you should see a tab called Options and a "+" button on the right side of it. Click the "+" button and it will expand. From there you can select the type of topic you want it to be: Normal, Announcement or Sticky.

I click "+" at the Option it got only Disable HTML in this post Disable BBCode in this post Disable Smilies in this post Attach signature (signatures can be changed in profile) Notify me when a reply is posted Delete this post